Rihanna to guest judge on 'X Factor' -- EXCLUSIVE PHOTOS

The rumors are true: Tonight on Fox’s X Factor, the competition series has lined up its first guest judge: Rihanna.

The singer will be joining LA Reid as he coaches the boys team at his home. And we’re hearing she’s not the only celebrity guest judge that’s going to appear tonight (hmmm…). Here’s two exclusive pics of Rihanna and L.A. Reid from tonight’s two-hour episode: